I'd use "famous" instead of "infamous" to describe the KT Fluff & Buff. In fact, that's why I bought a new P11 a few months ago! I've enjoyed tinkering with it more than shooting it, and that's saying a lot.
But your question was really "is it still necessary?" Not on mine. It was fine out of the box. However, the factory trigger pull is long, moderatly heavy at 8.5#, and has some disconcerting overtravel. None of that makes any difference in a CCW, but I wanted a lighter, shorter travel trigger with no perceptible overtravel.
I really enjoyed doing a trigger job on it that resulted in 6.5# pull, 0.55" travel, and it stops just short of the grip. Perfect, IMO!
KT's support is outstanding, and its products have a lifetime warranty.
Ex-fiance could mean several things -- like wife...? If she wants one for protection, you might also check out the P32. It's way smaller and lighter, comes in funky colors, and about as concealable as a wallet. (I'm not aware of any volunteers to be .32 targets to prove the unfounded rumor that it's an ineffective cartridge.)
As with anything, you get what you pay for, and the inexpensive line of KTs are great bargains, especially if you're inclined to "finish" them. Of course you can always pay a lot more for a P series Kahr or Taurus. They're also light and compact, but then you have to worry about their plastic frames cracking. The KTs have aluminum frames, steel slides, and polymer grips in an ingenious design.
BTW, I didn't like the way one of my P11's parts was machined. It wasn't a problem -- just at the tolerance limit for hole alignment of the barrel and recoil guide holes, but after years of making precision parts, I had a hard time feeling good about it. Sent it to KT for warranty replacement -- quick and easy!
The only complaint I have about KT is that it's not making enough money on its products. It could make a lot more by really tightening up its acceptance requirements for machined parts. Using well maintained CNC machine tools means that you will get the quality you insist on at exactly the same cost as looser tolerance and rougher finish parts. It would make a much higher profit because almost all the "problems" with KTs stem from manufacturing problems involving metal parts so the excellent, but expensive, warranty service wouldn't be so busy...! I'm doing my part to encourage them along those lines by refusing to accept "not exactly perfect" parts. After all, a GOOD machine shop foreman gets paid the same as one who's a little sloppy....
